the part should be generic for 89 and up gm columns, but you probably have a vats ignition with air bag in that model. My experience in past has been 120. for tear down and parts dependent on where you are and the going rate. this was east coast price. without tearing down column and inspecting parts hard to tell but there is a steering wheel lock pin that I have seen once in my life break and get stuck so nothing will remove it until torn down and replaced. Or column replace. I offered the service as a locksmith but many other services offer this type of repair

the pin sticking out the front of this device.. sticks into the back of item 10 of the diagram above...

there have been problems with the column locking systems... i have not had to work on this yet...

there are posts all over the place about this systems failures...

i was just trying to clarify the system components... not telling anybody that you were wrong.... i have worked the wheel back and forth while turning the key to get steering columns to unlock... in many many cars..